Home / 1,328,516.20-1,990,733.10-989,968.60

Finding the Fourth Proportional to 1,328,516.20, 1,990,733.10 and 989,968.60

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Solution

The fourth proportional to 1,328,516.20, 1,990,733.10 and 989,968.60 is: 1,483,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,516.20 : 1,990,733.10 = 989,968.60 : x
  2. Step 2: Convert to fraction form
    1,328,516.20/1,990,733.10 = 989,968.60/x
  3. Step 3: Cross multiply
    1,328,516.20x = 1,990,733.10 × 989,968.60
  4. Step 4: Simplify right side
    1,328,516.20x = 1,970,763,259,980.66
  5. Step 5: Solve for x
    x = 1,970,763,259,980.66/1,328,516.20
  6. Step 6: Final answer
    x = 1,483,431.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.